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在主动电磁轴承(active magnetic bearing,AMB)支承的高速电机系统中,转子的不平衡、电磁激励力及传感器的干扰等因素都会导致转子系统出现多频振动,严重地影响着电机的运行精度.为了抑制AMB-高速电机转子系统中的多频振动,该文提出一种通过电流补偿来对转子系统的多频振动进行控制的方法.首先建立四自由度AMB-高速电机刚性转子系统的动力学模型,分析多频电流形式,定义多频电流系数.然后,提出一种通过电流补偿来抑制AMB-转子多频振动的方法.接着,采用变步长三角形迭代搜索算法以加速多频电流系数的识别.最后,在某AMB-高速电机平台上进行仿真和试验研究.结果表明,提出的多频振动电流补偿算法可实现对多频电流系数的准确识别,能够对AMB-转子系统的多频振动进行有效地控制.“,”Multiple frequency vibrations of rotor system in active magnetic bearing (AMB)-high speed motors, caused by rotor imbalance, magnetic exciting force and sensor runout, have a great effect on operation precision. In order to suppress the multiple frequency vibrations of the rotor system in the AMB-high speed motors, a multiple frequency vibration control method via currents compensation was proposed. Firstly, based on the four degree of freedom AMB-rigid rotor model of high speed motors, the form of control currents was analyzed, and the multiple frequency current coefficients were defined at the same time. To suppress the multiple frequency vibrations of the AMB-rigid rotor system, a multiple frequency vibration control method via currents compensation was designed. Then, a triangular iterative search algorithm was proposed to identify the multiple frequency current coefficients. In order to overcome the problems in fixed step size search, a variable step size search was adopted. Finally, numerical simulations and experiments were carried out on an AMB-high speed motor system. The results show that the multiple frequency vibration control method via currents compensation proposed not only can achieve accurate identification of multiple frequency currents coefficients, but also can realize multiple frequency current compensation effectively, and the various multiple frequency vibrations are successfully suppressed.